What is the meaning of triangular ruler?

How many yards of sand do you need for 100 square feet at 2 inches deep? Is weakness a compound word? What set of numbers can be expressed as fractions decimals that repeat terminate or integers? What is 0.000513 expressed in scientific notation? What is the number you can cube to give an answer bigger than 200 but smaller than 300? What is 10 percent of 280000? Multiply 52 by 100? What is the answer to 19.2 Punchline Algebra book b? Is 129 a prime number or a composite number? Where do you see scientific notation in everyday life? What does plus 44 stand for? Who are the scholars who contributed to the critical study of the Pentateuch? A red card is drawn from a bridge deck of 52 cards 13 cards are drawn and found to be the same color how many ways you will obtain all black and then the number of way they will be all red? When rolling two dice what is the probability of rolling a sum that is a multiple of 3? What is 1704 rounded to the nearest 100? How do you find the perimeter of a triangle given two sides? What is a shape with three sides and three points but is side ways? What is unsystematic error? How to calculate Capacity factor k? How many zeros does 16 million have?